missing()

Tests if any contained or referenced match components evaluate to False. If missing() has no arguments, check if any headers are empty or missing.

Data signatures
missing()
missing( [a function indicating all headers or all variables: ] )
missing( [one of a set of match components: $${\color{green}None}$$ ǁ $${\color{green}Any}$$], ... )

Call signatures
missing()
missing( [a function indicating all headers or all variables: Variables ǁ Headers] )
missing( [one of a set of match components: Function ǁ Variable ǁ Header], ... )

Purpose	Value
Main focus	missing() determines if lines match

Context	Qualifier
Match qualifiers	onmatch
Value qualifiers	onmatch

[Back to index]